Alert archive / North Carolina / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 91, NWS Greenville-Spartanburg, SC

May 5, 2003Macon County, North Carolina; Rabun County, Georgia

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 5, 2003, 10:40 PM EDT for Macon County, North Carolina; Rabun County, Georgia. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 5, 2003, 10:40 PM EDT (02:40 UTC)
Expired
May 5, 2003, 11:30 PM EDT
In force
50 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Counties, with a storm outline in the text

Counties Rabun County, GA, Macon County, NC

The radar

The Greer radar (KGSP), 118 km from the middle of the area, began a volume at 02:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 2.7 hours before the alert went out and 203 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2003-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1313 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2003-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 211 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1313 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
782 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
211 m²/s²
0-3 km storm-relative helicity
399 m²/s²
Significant tornado parameter
3.1
Supercell composite
11.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS52 KGSP 060240
SVRGSP
GAC241-NCC113-060330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1040 PM EDT MON MAY 5 2003

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RABUN COUNTY IN NORTHEAST GEORGIA
  MACON COUNTY IN WESTERN NORTH CAROLINA

* UNTIL 1130 PM EDT

* AT 1040 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM 14 MILES EAST OF HAYESVILLE...OR ABOUT 3 MILES SOUTH
  OF RAINBOW SPRINGS...MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OTTO AT 1050 PM EDT.
  SCALY AT 1055 PM EDT.
  DILLARD AT 1103 PM EDT. 
  HIGHLANDS AT 1105 PM EDT.
  SKY VALLEY AT 1110 PM EDT.

PEOPLE IN THE PATH OF THIS SEVERE THUNDERSTORM SHOULD BE ALERT FOR
LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY
RAIN CAN OCCUR WITH ANY THUNDERSTORM.

LAT...LON 3516 8365 3510 8379 3500 8351 3486 8358
          3484 8351 3476 8350 3475 8338 3503 8314
          3531 8335

$$

BURRUS/DICARLO

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at May 5, 9:20 PM EDT, 1 hour 20 minutes earlier.

Area forecast discussion, May 5, 9:20 PM EDT, 1 hour 20 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
920 PM EDT MON MAY 5 2003

FLOODING CONTINUES TO BE OUR MAIN CONCERN THIS EVENING
AS TSTMS DISPT WHEN THEY HIT THE REMNANTS OF THE WEDGE
OVER THE CAROLINAS.  MINOR FLOODING HAS BEEN REPORTED
IN THE MOUNTAINS WITH ONE BRIDGE WASHED OUT 2 HOURS
AGO.  PLAN TO KEEP THE WATCH IN EFFECT THROUGH THE
NIGHT.

SVR TSTMS ACTIVITY IS STILL OFF TO THE WEST.  18Z
MODEL RUNS SEEM TO PUSH MOST ACTIVITY TO OUR SOUTH
TONIGHT ALONG THERMAL BOUNDARY THEN REFOCUS TOMORROW
IN NORTH CAROLINA AS A SERIES OF IMPULSES MOVE ACROSS
THE MOUNTAINS.

NO MAJOR CHANGES EXPECTED IN EVENING UPDATE EXCEPT
TO MODIFY TONIGHTS MINS TO FIT CURRENT LOWER TEMPS.

.GSP...
GA...FLOOD WATCH FOR TONIGHT AND TUE MORNING FOR ZONES
GAZ010...GAZ017>018.

NC...FLOOD WATCH FOR TONIGHT AND TUE MORNING FOR ZONES
NCZ048...NCZ051>053...NCZ058>059...NCZ062>065.

SC...FLOOD WATCH FOR TONIGHT AND TUE MORNING FOR ZONES
SCZ001>002...SCZ004>005.

DICARLO
Hazardous weather outlook, May 5, 4:53 AM EDT, 17 hours 47 minutes before
GAZ010-017-018-026-028-029-NCZ033>037-048>059-062>072-082-SCZ001>014-
019-051100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
453 AM EDT MON MAY 5 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA...
UPSTATE SOUTH CAROLINA...AND EXTREME NORTHEAST GEORGIA.

.DAY ONE...TODAY

SEVERE THUNDERSTORMS ARE POSSIBLE TODAY...SOME WITH TORNADOES...LARGE
HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TODAY.

RB

In the hours before

Special weather statement, May 5, 9:56 PM EDT, 44 minutes before
NCZ058-062-060245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
956 PM EDT MON MAY 5 2003

THE NATIONAL WEATHER SERVICE IS MONITORING A VERY STRONG THUNDERSTORM
IN SOUTHWEST NORTH CAROLINA.  THIS STORM HAS A HISTORY OF PRODUCING
SEVERE WEATHER.

WHILE THE STRONGEST PART OF THE STORM WILL MOVE THROUGH CHEROKEE AND
CLAY COUNTIES...PERSONS IN SOUTHERN GRAHAM AND MACON COUNTIES SHOULD
BE PREPARED FOR STRONG GUSTY WINDS...FREQUENT LIGHTNING AND HAIL.

LOCAL FLOODING IS POSSIBLE IN HEAVIER DOWNPOURS.  MOTORISTS ARE
URGED TO USE EXTREME CARE.  MOST FLOOD FATALITIES OCCUR IN VEHICLES
DURING THE NIGHT.

THE NATIONAL WEATHER SERVICE WILL CONTINUE TO MONITOR THE PROGRESS OF
THIS DEVELOPING WEATHER SITUATION.

DICARLO
Special weather statement, May 5, 10:17 PM EDT, 23 minutes before
GAZ010-060315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1015 PM EDT MON MAY 5

THE NATIONAL WEATHER SERVICE IS MONITORING A VERY STRONG THUNDERSTORM
IN SOUTHWEST NORTH CAROLINA.  THIS STORM HAS A HISTORY OF PRODUCING
SEVERE WEATHER.

AT 1015 PM RADAR INDICATED THE STORM WAS MOVING INTO CLAY COUNTY
NORTH CAROLINA.  IT IS EXPECTED TO MOVE SOOUTHEASTWARD ACROSS
NORTHERN RABUN COUNTY BETWEEN 1030 AND 1100 PM.

THIS STORM IS SLOWLY WEAKENING BUT IT CAN STILL PRODUCE STRONG
GUSTY WINDS...FREQUENT LIGHTNING...HAIL AND VERY HEAVY RAIN.

MOTORISTS IN RABUN COUNTY ARE URGED TO USE CAUTION IN THIS STORM.
REMEMBER MOST FLOOD FATALITIES OCCUR IN VEHICLES AT NIGHT.

THE NATIONAL WEATHER SERVICE WILL CONTINUE TO MONITOR THE PROGRESS OF
THIS DEVELOPING WEATHER SITUATION.

DICARLO

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 11:19 PM EDTSevere Thunderstorm WarningGSPJackson41 min
May 6, 6:05 AM EDTFlash Flood WarningGSPGraham, Haywood, Jackson, Macon, Swain4 hr
May 6, 8:00 AM EDTFlash Flood WarningGSPBuncombe, Madison4 hr
May 6, 10:02 AM EDTFlash Flood WarningGSPGraham, Haywood, Jackson, Macon, Swain118 min
May 6, 12:00 PM EDTFlash Flood WarningGSPBuncombe, Graham, Haywood, Henderson, Jackson, Macon and 3 more4 hr
May 6, 1:42 PM EDTTornado WarningGSPFranklin33 min
May 6, 2:04 PM EDTTornado WarningGSPElbert, Hart56 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2003Severe Thunderstorm Warnings in Georgia, 2003Every severe thunderstorm warning in 2003

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.